45
b.
The other end of the cable provides one pair or multiple pairs of 75-ohm BNC connectors.
Connect the TX connectors and the RX connectors on this end to the RX connectors and
the TX connectors on the remote device respectively.
Figure 53 Connect an E1 75-ohm cable
•
If you want to extend the cable, connect each BNC connector of the E1 75-ohm cable to one
end of a coaxial connector, and connect the remote device to the other end of the coaxial
connector through an E1 75-ohm adapter cable.
Figure 54 Connecting an E1 75-ohm cable
•
If the impedance of the E1 interface on the remote device is 120 ohms, you must use an
impedance converter to adapt the impedance.
Figure 55 Connecting an impedance converter
……
E1 / E1-F
(75ohm)
TX
RX
Device
(120ohm E1 Port)
E1 75-ohm cable
Straight-through cable
Impedance converter